... Get the Horns
From Halopedia, the Halo wiki
... Get the Horns
... Get the Horns is a Halo 3 achievement that is gained by getting a Bulltrue Medal in one of the Mythic Maps in either a ranked or a social playlist.
It is worth 25 Gamerscore.
This achievement is represented by a bronze and silver signpost with a bull head on top of it.
Tips
This can be done on Rumble Pit if Braaains on Dismemberment is selected, because zombies have swords, and humans have shotguns, so it's very easy if you are lucky enough to find Mythic Infection. It is also easy to do with Grifball on Grifbox in the Action Sack playlist.
See also